$ git clone -n https://src.fedoraproject.org/rpms/isoimagewriter.git /var/lib/mock/f42-build-863491-171710/root/chroot_tmpdir/scmroot/isoimagewriter
Cloning into '/var/lib/mock/f42-build-863491-171710/root/chroot_tmpdir/scmroot/isoimagewriter'...
$ git fetch origin 2230769d9ccc61eb881ddc2d06409f291497ecb3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/isoimagewriter
 * [new ref]         2230769d9ccc61eb881ddc2d06409f291497ecb3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2230769 24.12.0