$ git clone -n https://src.fedoraproject.org/rpms/postgresql15.git /var/lib/mock/f42-build-862655-170994/root/chroot_tmpdir/scmroot/postgresql15
Cloning into '/var/lib/mock/f42-build-862655-170994/root/chroot_tmpdir/scmroot/postgresql15'...
$ git fetch origin f0d15bb9e937f2498c19b53748f363c2494386e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/postgresql15
 * [new ref]         f0d15bb9e937f2498c19b53748f363c2494386e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f0d15bb Rebuild for ICU 76