$ git clone -n https://src.fedoraproject.org/rpms/egl-gbm.git /var/lib/mock/f45-build-7982-372/root/chroot_tmpdir/scmroot/egl-gbm
Cloning into '/var/lib/mock/f45-build-7982-372/root/chroot_tmpdir/scmroot/egl-gbm'...
$ git fetch origin 171bff14339d2324a9392a54f478f40bf007d5b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/egl-gbm
 * [new ref]         171bff14339d2324a9392a54f478f40bf007d5b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 171bff1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild