$ git clone -n https://src.fedoraproject.org/rpms/rust-handlebars.git /var/lib/mock/f40-build-740013-109436/root/chroot_tmpdir/scmroot/rust-handlebars
Cloning into '/var/lib/mock/f40-build-740013-109436/root/chroot_tmpdir/scmroot/rust-handlebars'...
$ git fetch origin 4bec3f742d929829a600f59c0e7bf42105918850:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-handlebars
 * [new ref]         4bec3f742d929829a600f59c0e7bf42105918850 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4bec3f7 Update to version 4.3.7; Fixes RHBZ#2062363