$ git clone -n https://src.fedoraproject.org/rpms/migrate.git /var/lib/mock/f40-build-2254410-54227/root/chroot_tmpdir/scmroot/migrate
Cloning into '/var/lib/mock/f40-build-2254410-54227/root/chroot_tmpdir/scmroot/migrate'...
$ git fetch origin 89adda8f16b5106ad96e63aef2e7d6fcc8bce761:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/migrate
 * [new ref]         89adda8f16b5106ad96e63aef2e7d6fcc8bce761 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 89adda8 Update to version 4.17.0 (RHBZ#2255526)