$ git clone -n https://src.fedoraproject.org/rpms/gawk-errno.git /var/lib/mock/f45-build-9625-406/root/chroot_tmpdir/scmroot/gawk-errno
Cloning into '/var/lib/mock/f45-build-9625-406/root/chroot_tmpdir/scmroot/gawk-errno'...
$ git fetch origin 1a48b313f5d94b514ea6091b50ac558b63f680e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gawk-errno
 * [new ref]         1a48b313f5d94b514ea6091b50ac558b63f680e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a48b31 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild